I have had a back problem for several years and find my painpod is the best way to manage what used to be a constant ache. After using this product persistently for the last two years, I now can go for weeks without pain or minimal pain. The moment I get any discomfort or have done something that I think will aggravate my back, I use my painpod. I now have two painpods - one is the heat- as my back reponds better with heat at times. That way I can always have ine charged-especially when travelling and charging in the van is a bit slower. Couldn’t live without it now.